/*
 * Alloy Analyzer
 * Copyright (c) 2002 Massachusetts Institute of Technology
 *
 * The Alloy Analyzer is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * The Alloy Analyzer is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with the Alloy Analyzer; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package alloy.semantic;

import java.util.Iterator;

import alloy.ast.ASTDepthFirstVisitor;
import alloy.ast.Decl;
import alloy.ast.QuantifiedFormula;
import alloy.util.Dbg;
import alloy.util.Msg;

/**
   Checks for higher-order quantifiers and flags an error if it finds one.
*/

public class CheckHigherOrderQuantifiersVisitor extends ASTDepthFirstVisitor {

    public void visit(QuantifiedFormula quantForm_) {
        // assumes quantifiers have been desugared, so only
        // "some" and "all" are left
        Iterator declIter = quantForm_.getDecls().getDeclIter();

        while (declIter.hasNext()) {
            Decl decl = (Decl)declIter.next();

            if (decl.isHigherOrder()) {
                Dbg.user(new Msg("higher-order declaration in quantified formula", decl));
        }
        }
        quantForm_.getBody().applyVisitor(this);
    }

}





